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Advances in Implantable Microelectrode Array Insertion and Positioning.

David Atkinson1, Tania D'Souza1, Jai Singh Rajput1

  • 1Department of Bioengineering, Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas, Richardson, TX, USA.

Neuromodulation : Journal of the International Neuromodulation Society
|January 13, 2021
PubMed
Summary
This summary is machine-generated.

New microelectrode array implantation methods, including those using microactuators and magnetic steering, aim to improve long-term brain recordings for neuroprosthetics. These innovations move beyond traditional single-axis insertion for better brain tissue access.

Keywords:
Arrayimplantationinsertionmicroelectrodetissue response

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Materials Science

Background:

  • Microelectrode arrays are crucial for brain research and neuroprosthetics, but current insertion methods limit long-term functionality.
  • Existing single-axis insertion techniques face challenges in achieving consistent, long-term chronic recordings.
  • Novel probe designs and implantation strategies are needed to overcome these limitations.

Purpose of the Study:

  • To review current microelectrode array implantation technologies and their limitations.
  • To survey emergent methods for microelectrode array implantation, focusing on novel approaches.
  • To explore techniques that leverage microactuators and multi-axis insertion for improved brain access.

Main Methods:

  • A comprehensive literature search was conducted using major scientific databases (PubMed, Web of Science, Google Scholar).
  • The review focuses on technologies enabling probe implantation, repositioning, and stimulation/recording from tissue volumes.
  • Analysis of current and emerging methods for microelectrode array insertion.

Main Results:

  • Significant advancements in microscale and embedded technologies facilitate probe repositioning for sustained brain recordings.
  • Material science innovations have led to deployable structures for targeted tissue recording or stimulation.
  • Magnetically steerable catheters and needles offer a new "pull" approach for tissue probe insertion.

Conclusions:

  • A new generation of probes and insertion methodologies is emerging for neuromodulation.
  • These innovations promise reliable chronic performance for devices implanted throughout the brain.
  • Future developments will enable precise positioning of devices for advanced brain-computer interfaces.